remove workflow for arm64

Author: sumneko

.github/workflows/build.yml

@@ -21,7 +21,6 @@ jobs:
       matrix:
         include:
           - { os: ubuntu-18.04,   target: linux,   platform: linux-x64    }
-          - { os: ubuntu-18.04,   target: linux,   platform: linux-arm64  }
           - { os: macos-11,       target: darwin,  platform: darwin-x64   }
           - { os: macos-11,       target: darwin,  platform: darwin-arm64 }
           - { os: windows-latest, target: windows, platform: win32-ia32   }

make.lua

@@ -28,6 +28,7 @@ elseif platform.OS == 'Linux' then
     if lm.platform == nil then
     elseif lm.platform == "linux-x64" then
     elseif lm.platform == "linux-arm64" then
+        -- TODO: not implement
         lm.compiler = "clang"
         lm.target   = "arm64-pc-linux-gnu"
     else