Remove unused flags.Nocrt

Nocrt is handled through deps.CrtBegin/End, flags.Nocrt is unused

Change-Id: I8ab5313bb2eb3a00e336504d6dd3813350fbe14d
Test: soong builds

cc/builder.go

@@ -161,7 +161,6 @@ type builderFlags struct {
 	ldFlags     string
 	libFlags    string
 	yaccFlags   string
-	nocrt       bool
 	toolchain   config.Toolchain
 	clang       bool
 

cc/cc.go

@@ -94,7 +94,6 @@ type Flags struct {
 	LdFlags     []string // Flags that apply to linker command lines
 	libFlags    []string // Flags to add libraries early to the link order
 
-	Nocrt     bool
 	Toolchain config.Toolchain
 	Clang     bool
 

cc/linker.go

@@ -136,8 +136,6 @@ func (linker *baseLinker) linkerDeps(ctx BaseModuleContext, deps Deps) Deps {
 func (linker *baseLinker) linkerFlags(ctx ModuleContext, flags Flags) Flags {
 	toolchain := ctx.toolchain()
 
-	flags.Nocrt = Bool(linker.Properties.Nocrt)
-
 	if !ctx.noDefaultCompilerFlags() {
 		if ctx.Device() && !Bool(linker.Properties.Allow_undefined_symbols) {
 			flags.LdFlags = append(flags.LdFlags, "-Wl,--no-undefined")

cc/util.go

@@ -95,7 +95,6 @@ func flagsToBuilderFlags(in Flags) builderFlags {
 		yaccFlags:   strings.Join(in.YaccFlags, " "),
 		ldFlags:     strings.Join(in.LdFlags, " "),
 		libFlags:    strings.Join(in.libFlags, " "),
-		nocrt:       in.Nocrt,
 		toolchain:   in.Toolchain,
 		clang:       in.Clang,
 	}