Revert "runtime: map; llgo/ssa: MapUpdate"

internal/abi/type.go

@@ -170,24 +170,6 @@ type MapType struct {
 	Flags      uint32
 }
 
-// Note: flag values must match those used in the TMAP case
-// in ../cmd/compile/internal/reflectdata/reflect.go:writeType.
-func (mt *MapType) IndirectKey() bool { // store ptr to key instead of key itself
-	return mt.Flags&1 != 0
-}
-func (mt *MapType) IndirectElem() bool { // store ptr to elem instead of elem itself
-	return mt.Flags&2 != 0
-}
-func (mt *MapType) ReflexiveKey() bool { // true if k==k for all keys
-	return mt.Flags&4 != 0
-}
-func (mt *MapType) NeedKeyUpdate() bool { // true if we need to update key on an overwrite
-	return mt.Flags&8 != 0
-}
-func (mt *MapType) HashMightPanic() bool { // true if hash function might panic
-	return mt.Flags&16 != 0
-}
-
 type PtrType struct {
 	Type
 	Elem *Type // pointer element (pointed at) type