[nfc] remove outdated FIXME's

Author: kavon

lib/Sema/TypeCheckType.cpp

@@ -2301,7 +2301,6 @@ bool TypeResolver::diagnoseMoveOnlyMissingOwnership(
   diagnose(repr->getLoc(),
            diag::moveonly_parameter_missing_ownership);
 
-  // FIXME: this should be 'borrowing'
   diagnose(repr->getLoc(), diag::moveonly_parameter_ownership_suggestion,
            "borrowing", "for an immutable reference")
       .fixItInsert(repr->getStartLoc(), "borrowing ");
@@ -2310,7 +2309,6 @@ bool TypeResolver::diagnoseMoveOnlyMissingOwnership(
            "inout", "for a mutable reference")
       .fixItInsert(repr->getStartLoc(), "inout ");
 
-  // FIXME: this should be 'consuming'
   diagnose(repr->getLoc(), diag::moveonly_parameter_ownership_suggestion,
            "consuming", "to take the value from the caller")
       .fixItInsert(repr->getStartLoc(), "consuming ");

test/Constraints/moveonly_constraints.swift

@@ -163,8 +163,6 @@ func checkCasting(_ b: any Box, _ mo: __shared MO, _ a: Any) {
   _ = a as MO // expected-error {{cannot convert value of type 'Any' to type 'MO' in coercion}}
   _ = b as MO // expected-error {{cannot convert value of type 'any Box' to type 'MO' in coercion}}
 
-  // FIXME(kavon): make sure at runtime these casts actually fail, or just make them errors? (rdar://104900293)
-
   _ = MO() is AnyHashable // expected-warning {{cast from 'MO' to unrelated type 'AnyHashable' always fails}}
   // expected-error@-1 {{move-only types cannot be conditionally cast}}
   _ = MO() is AnyObject // expected-warning {{cast from 'MO' to unrelated type 'AnyObject' always fails}}