CI: Remove extraneous toolchain job from Azure CI

This was useful when building both i686 and x86_64 SerenityOS targets as
we could use a single toolchain build for both targets. But now all this
extra job does is create the opportunity for the toolchain to need to be
built twice (i.e. if the pipelines are backed up and the toolchain cache
is busted between these jobs while the x86_64 step is waiting for a VM).

Meta/Azure/Serenity.yml

@@ -33,7 +33,7 @@ jobs:
         serenity_ccache_path: '$(SERENITY_CCACHE_DIR)'
 
     - script: ./Toolchain/BuildClang.sh --ci
-      displayName: Extract Toolchain
+      displayName: Build Toolchain
       env:
         TRY_USE_LOCAL_TOOLCHAIN: 'y'
 

Meta/Azure/Toolchain.yml

@@ -1,34 +0,0 @@
-jobs:
-  - job: 'Serenity_Clang_Toolchain'
-    timeoutInMinutes: 0 # Setting to 0 means the maximum allowed timeout is used.
-
-    variables:
-    - name: LLVM_CCACHE_DIR
-      value: $(Build.SourcesDirectory)/Toolchain/.ccache
-    - name: LLVM_CCACHE_MAXSIZE
-      value: 20GB
-
-    pool:
-      vmImage: ubuntu-22.04
-
-    steps:
-    - template: Setup.yml
-      parameters:
-        os: 'Serenity'
-
-    - template: Caches.yml
-      parameters:
-        toolchain: 'clang'
-        toolchain_ccache_path: '$(LLVM_CCACHE_DIR)'
-        toolchain_ccache_size: '$(LLVM_CCACHE_MAXSIZE)'
-        with_remote_data_caches: false
-
-    - script: ./Toolchain/BuildClang.sh --ci
-      displayName: Build Toolchain
-      env:
-        TRY_USE_LOCAL_TOOLCHAIN: 'y'
-
-    - script: |
-        echo "##[section]Toolchain Cache"
-        CCACHE_DIR='$(LLVM_CCACHE_DIR)' ccache -s
-      displayName: 'Cache Stats'

azure-pipelines.yml

@@ -23,14 +23,8 @@ stages:
         parameters:
           os: 'macOS'
 
-  - stage: Toolchain
-    dependsOn: []
-
-    jobs:
-      - template: Meta/Azure/Toolchain.yml
-
   - stage: SerenityOS
-    dependsOn: Toolchain
+    dependsOn: []
 
     jobs:
       - template: Meta/Azure/Serenity.yml