test(ci): remove "clearCaches" workflow feature

in practice it is currently unused
it was added originally because github offered no way to delete caches
cache management (including delete) is possible using github web ui now though,
and it is all I've used for months

.github/workflows/lint.yml

@@ -2,11 +2,6 @@ name: Code Quality Checks
 
 on:
   workflow_dispatch:
-    inputs:
-      clearCaches:
-        description: "Clear workflow caches where possible"
-        required: false
-        type: string
   pull_request:
   push:
     # Ignore merge queue branches on push; avoids merge_group+push concurrency race since ref is same
@@ -44,14 +39,6 @@ jobs:
           cache-read-only: ${{ github.ref != 'refs/heads/main' }}
           gradle-home-cache-cleanup: true
 
-      - name: Clear Caches Optionally
-        if: "${{ github.event.inputs.clearCaches != '' }}"
-        shell: bash
-        run: |
-          du -sk ~/.gradle
-          rm -fr ~/.gradle
-          du -sk ~/.gradle || echo ~/.gradle is gone
-
       - name: Warm Gradle Cache
         # This makes sure we fetch gradle network resources with a retry
         uses: nick-invision/retry@v3

.github/workflows/tests_emulator.yml

@@ -2,11 +2,6 @@ name: Emulator Tests
 
 on:
   workflow_dispatch:
-    inputs:
-      clearCaches:
-        description: "Clear workflow caches where possible"
-        required: false
-        type: string
   pull_request:
   push:
     # Ignore merge queue branches on push; avoids merge_group+push concurrency race since ref is same
@@ -78,17 +73,6 @@ jobs:
           restore-keys: |
             avd-${{ matrix.api-level }}-${{ matrix.arch }}-${{matrix.target}}-v1
 
-      - name: Clear Caches Optionally
-        if: "${{ github.event.inputs.clearCaches != '' }}"
-        shell: bash
-        run: |
-          du -sk ~/.gradle
-          du -sk ~/.android
-          rm -fr ~/.gradle
-          rm -fr ~/.android
-          du -sk ~/.gradle || echo ~/.gradle is gone
-          du -sk ~/.android || echo ~/.android is gone
-
       - name: Warm Gradle Cache
         # This makes sure we fetch gradle network resources with a retry
         uses: nick-invision/retry@v3

.github/workflows/tests_unit.yml

@@ -3,10 +3,6 @@ name: Unit Tests
 on:
   workflow_dispatch:
     inputs:
-      clearCaches:
-        description: "Clear workflow caches where possible, empty means false"
-        required: false
-        type: string
       iterations:
         description: "Number of iterations on each chosen operating system. Default 1. Max 85."
         required: true
@@ -151,14 +147,6 @@ jobs:
           # Requested in: https://github.com/gradle/actions/issues/167#issuecomment-2052352341
           #   gradle-home-cache-cleanup: true
 
-      - name: Clear Caches Optionally
-        if: "${{ github.event.inputs.clearCaches != '' }}"
-        shell: bash
-        run: |
-          du -sk ~/.gradle
-          rm -fr ~/.gradle
-          du -sk ~/.gradle || echo ~/.gradle is gone
-
       - name: Gradle Dependency Download
         uses: nick-invision/retry@v3
         with: