Remove unused @types/eslint and mock-require dependencies (#1998)

## Why

Three devDependencies in `packages/databricks-vscode` are declared but
**never referenced** anywhere in source, scripts, or config:

- **`@types/eslint`** — a legacy community type stub for older ESLint.
The only custom lint rule (`mutexSynchronisedDecorator`) is typed via
`@typescript-eslint/utils`, and modern ESLint (9+) ships its own types.
Dependabot opened #1994 to bump it `8.56.12 → 9.6.1`, but bumping an
unused package is churn. **This PR supersedes #1994**, which can be
closed.
- **`mock-require` + `@types/mock-require`** — an unused mocking helper
(last published 2019) and its types. Test code uses `ts-mockito`, not
`mock-require`.

Removing them cleans up dead weight and shrinks the surface for the
eventual ESLint 9/10 flat-config migration.

## What

- Drop `@types/eslint`, `mock-require`, and `@types/mock-require` from
`packages/databricks-vscode/package.json`.
- Regenerate `yarn.lock`; this also drops now-orphaned transitive deps
with no other dependents:
  - via `@types/eslint`: `@types/estree`, `@types/json-schema`
- via `mock-require`: `get-caller-file@^1`, `normalize-path@^2`,
`remove-trailing-separator`

## Verification

- Confirmed **zero references** for all three: no imports, no API-type
usage (`Rule`/`Linter`/`ESLint`), not in any tsconfig `types` array —
only the package.json declaration lines.
- `yarn.lock` confirms all were **direct deps only** (not transitive);
every orphaned transitive dep confirmed to have **0 remaining refs**.
- `tsc --build --force` (workspace TypeScript 6.0.3): **exit 0**, no
errors.
- `yarn test:lint` (eslint + prettier): **exit 0**, custom local rule
intact.

## Backward compatibility

Dev-tooling only — no shipped extension code or behavior changes. No
user-facing compatibility impact.

This pull request and its description were written by Isaac.

Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: Happy <yesreply@happy.engineering>

Author: 3 people

packages/databricks-vscode/package.json

@@ -1564,11 +1564,9 @@
         "@istanbuljs/nyc-config-typescript": "^1.0.2",
         "@sinonjs/fake-timers": "^15.4.0",
         "@types/chai": "^4.3.11",
-        "@types/eslint": "^8.44.9",
         "@types/fs-extra": "^11.0.4",
         "@types/ini": "^4.1.1",
         "@types/mocha": "^10.0.6",
-        "@types/mock-require": "^3.0.0",
         "@types/node": "^22.0.0",
         "@types/semver": "^7.5.0",
         "@types/tmp": "^0.2.6",
@@ -1592,7 +1590,6 @@
         "fs-extra": "^11.2.0",
         "glob": "^13.0.6",
         "mocha": "^11.7.6",
-        "mock-require": "^3.0.3",
         "nyc": "^18.0.0",
         "prettier": "^3.1.1",
         "quicktype-core": "^23.0.0",

yarn.lock

@@ -1573,23 +1573,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@types/eslint@npm:^8.44.9":
-  version: 8.44.9
-  resolution: "@types/eslint@npm:8.44.9"
-  dependencies:
-    "@types/estree": "*"
-    "@types/json-schema": "*"
-  checksum: 6f8889e94e67a5e43c15f5a2530798f864ace08c270bfb3f153cb705da4e30a80e0e9a0fc05317c8642c8dda909d528968172089eb4d52aca9f212761df25d90
-  languageName: node
-  linkType: hard
-
-"@types/estree@npm:*":
-  version: 1.0.3
-  resolution: "@types/estree@npm:1.0.3"
-  checksum: f21a5448995f8aa61ab2248d10590d275666b11d26c27fe75b3c23420b07b469d5ce820deefcf7399671faa09d56eb7ce012322948e484d94686fda154be5221
-  languageName: node
-  linkType: hard
-
 "@types/fs-extra@npm:^11.0.4":
   version: 11.0.4
   resolution: "@types/fs-extra@npm:11.0.4"
@@ -1646,13 +1629,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@types/json-schema@npm:*":
-  version: 7.0.14
-  resolution: "@types/json-schema@npm:7.0.14"
-  checksum: 4b3dd99616c7c808201c56f6c7f6552eb67b5c0c753ab3fa03a6cb549aae950da537e9558e53fa65fba23d1be624a1e4e8d20c15027efbe41e03ca56f2b04fb0
-  languageName: node
-  linkType: hard
-
 "@types/jsonfile@npm:*":
   version: 6.1.1
   resolution: "@types/jsonfile@npm:6.1.1"
@@ -1676,13 +1652,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@types/mock-require@npm:^3.0.0":
-  version: 3.0.0
-  resolution: "@types/mock-require@npm:3.0.0"
-  checksum: 81d24326f760c5e560f49c96b7ac3e6c91fd8f3d4bfa4303f83c326022758ab7accded8ab83542bea5402cd997c1114fd24e80a17e598a6c8f36e48055e8aae8
-  languageName: node
-  linkType: hard
-
 "@types/node@npm:*":
   version: 18.15.11
   resolution: "@types/node@npm:18.15.11"
@@ -4019,12 +3988,10 @@ __metadata:
     "@istanbuljs/nyc-config-typescript": ^1.0.2
     "@sinonjs/fake-timers": ^15.4.0
     "@types/chai": ^4.3.11
-    "@types/eslint": ^8.44.9
     "@types/fs-extra": ^11.0.4
     "@types/ini": ^4.1.1
     "@types/lodash": ^4.14.202
     "@types/mocha": ^10.0.6
-    "@types/mock-require": ^3.0.0
     "@types/node": ^22.0.0
     "@types/semver": ^7.5.0
     "@types/shell-quote": ^1.7.5
@@ -4059,7 +4026,6 @@ __metadata:
     markdown-it: ^14.2.0
     minimatch: ^10.0.1
     mocha: ^11.7.6
-    mock-require: ^3.0.3
     nyc: ^18.0.0
     prettier: ^3.1.1
     quicktype-core: ^23.0.0
@@ -5623,13 +5589,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"get-caller-file@npm:^1.0.2":
-  version: 1.0.3
-  resolution: "get-caller-file@npm:1.0.3"
-  checksum: 2b90a7f848896abcebcdc0acc627a435bcf05b9cd280599bc980ebfcdc222416c3df12c24c4845f69adc4346728e8966f70b758f9369f3534182791dfbc25c05
-  languageName: node
-  linkType: hard
-
 "get-caller-file@npm:^2.0.1, get-caller-file@npm:^2.0.5":
   version: 2.0.5
   resolution: "get-caller-file@npm:2.0.5"
@@ -7804,16 +7763,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"mock-require@npm:^3.0.3":
-  version: 3.0.3
-  resolution: "mock-require@npm:3.0.3"
-  dependencies:
-    get-caller-file: ^1.0.2
-    normalize-path: ^2.1.1
-  checksum: 6355c0bd9d7acb5247155142928b0154ace2913264b42d9a611a85d469ed11048f405efe432ffc627a57efb87ec359589a7419bf680b4fd248612311deb031bd
-  languageName: node
-  linkType: hard
-
 "modern-tar@npm:^0.7.2":
   version: 0.7.6
   resolution: "modern-tar@npm:0.7.6"
@@ -8004,15 +7953,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"normalize-path@npm:^2.1.1":
-  version: 2.1.1
-  resolution: "normalize-path@npm:2.1.1"
-  dependencies:
-    remove-trailing-separator: ^1.0.1
-  checksum: 7e9cbdcf7f5b8da7aa191fbfe33daf290cdcd8c038f422faf1b8a83c972bf7a6d94c5be34c4326cb00fb63bc0fd97d9fbcfaf2e5d6142332c2cd36d2e1b86cea
-  languageName: node
-  linkType: hard
-
 "normalize-path@npm:^3.0.0, normalize-path@npm:~3.0.0":
   version: 3.0.0
   resolution: "normalize-path@npm:3.0.0"
@@ -8993,13 +8933,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"remove-trailing-separator@npm:^1.0.1":
-  version: 1.1.0
-  resolution: "remove-trailing-separator@npm:1.1.0"
-  checksum: d3c20b5a2d987db13e1cca9385d56ecfa1641bae143b620835ac02a6b70ab88f68f117a0021838db826c57b31373d609d52e4f31aca75fc490c862732d595419
-  languageName: node
-  linkType: hard
-
 "require-directory@npm:^2.1.1":
   version: 2.1.1
   resolution: "require-directory@npm:2.1.1"