Revert "manifest: Sync minimal GCC AS toolchain from aosp"

* No longer needed

This reverts commit 2968c469244fda2ec6a9871589eb853e4a711b83.

Change-Id: I7235972a7e81e53557c25ab4c8d917009d7fa4ad
diff --git a/default.xml b/default.xml
index 4c758f8..ce28cd0 100644
--- a/default.xml
+++ b/default.xml
@@ -899,7 +899,6 @@
   <project path="prebuilts/cmdline-tools" name="platform/prebuilts/cmdline-tools" groups="pdk-fs" clone-depth="1" remote="aosp" />
   <project path="prebuilts/devtools" name="platform/prebuilts/devtools" groups="pdk-fs" clone-depth="1" remote="aosp" />
   <project path="prebuilts/fuchsia_sdk" name="platform/prebuilts/fuchsia_sdk" groups="pdk-fs" clone-depth="1" remote="aosp" />
-  <project path="prebuilts/gas/linux-x86" name="platform/prebuilts/gas/linux-x86" groups="pdk,linux,x86" clone-depth="1" remote="aosp" revision="592150fc8ae9f48f2e73f390961f32ca6f5f6a9f" />
   <project path="prebuilts/gcc/darwin-x86/aarch64/aarch64-linux-android-4.9" name="LineageOS/android_prebuilts_gcc_darwin-x86_aarch64_aarch64-linux-android-4.9" groups="pdk,darwin,arm" clone-depth="1" />
   <project path="prebuilts/gcc/darwin-x86/arm/arm-linux-androideabi-4.9" name="LineageOS/android_prebuilts_gcc_darwin-x86_arm_arm-linux-androideabi-4.9" groups="pdk,darwin,arm" clone-depth="1" />
   <project path="prebuilts/gcc/darwin-x86/host/i686-apple-darwin-4.2.1" name="platform/prebuilts/gcc/darwin-x86/host/i686-apple-darwin-4.2.1" groups="pdk,darwin" clone-depth="1" remote="aosp" />