CI: remove Pixi ccache mtime workaround (#238)

Co-authored-by: Pradyot Ranjan <99216956+pradyotRanjan@users.noreply.github.com>
Signed-off-by: Pradyot Ranjan <99216956+pradyotRanjan@users.noreply.github.com>

Author: prady0t

.github/workflows/gpu_tests.yml

@@ -7,8 +7,6 @@ permissions:
 
 env:
   CCACHE_DIR: "${{ github.workspace }}/.ccache"
-  # Needed because Pixi doesn't set mtime for compilers
-  CCACHE_COMPILERCHECK: "content"
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}

.github/workflows/tests.yml

@@ -7,8 +7,6 @@ permissions:
 
 env:
   CCACHE_DIR: "${{ github.workspace }}/.ccache"
-  # Needed because Pixi doesn't set mtime for compilers
-  CCACHE_COMPILERCHECK: "content"
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}