.github/codeql.yml: Drop ArmPkg IA32 and X64 from build matrix

These archs are not supported by ArmPkg so we can save agent
resources by not attempting to schedule their CodeQL build.

Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com>

Author: makubacki

.github/workflows/codeql.yml

@@ -35,8 +35,6 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - Package: "ArmPkg"
-            ArchList: "IA32,X64"
           - Package: "CryptoPkg"
             ArchList: "IA32"
           - Package: "CryptoPkg"