Remove remaining MIPS support.

With the exception of dwarf support in libelffile.

Test: aosp_taimen-userdebug boots.
Test: m test-art-host-gtest
Test: testrunner.py --host --optimizing
Bug: 147346243
Change-Id: Ib25acbc98aa7f63ce49a7ed2f81a4a64d48eac39
diff --git a/build/codegen.go b/build/codegen.go
index 7ada8f5..bc7dc42 100644
--- a/build/codegen.go
+++ b/build/codegen.go
@@ -62,10 +62,6 @@
 			arch = &c.Codegen.Arm
 		case "arm64":
 			arch = &c.Codegen.Arm64
-		case "mips":
-			arch = &c.Codegen.Mips
-		case "mips64":
-			arch = &c.Codegen.Mips64
 		case "x86":
 			arch = &c.Codegen.X86
 		case "x86_64":
@@ -192,7 +188,7 @@
 
 type codegenProperties struct {
 	Codegen struct {
-		Arm, Arm64, Mips, Mips64, X86, X86_64 codegenArchProperties
+		Arm, Arm64, X86, X86_64 codegenArchProperties
 	}
 }
 
@@ -203,8 +199,6 @@
 		arches[s] = true
 		if s == "arm64" {
 			arches["arm"] = true
-		} else if s == "mips64" {
-			arches["mips"] = true
 		} else if s == "x86_64" {
 			arches["x86"] = true
 		}