Remove implicit --optimize from testing dartc component in release mode

tests/language/language.status

Index: tests/language/language.status
diff --git a/tests/language/language.status b/tests/language/language.status
index 6fb005a6787be9beec673be6fc69d24b4d934d6d..63a9cf833a375b21ed809f20d3b9fd86833bca6b 100644
--- a/tests/language/language.status
+++ b/tests/language/language.status
@@ -104,22 +104,6 @@ GCTest: Skip  # Takes too long.
 
 [ $component == vm && $mode == release ]
 
-# Problems specific to dartc optimized mode
-[ ($component == dartc || $component == chromium) && $mode == release ]
-
-CTConst2Test: Fail                       # Codesite issue 124
-CallThroughNullGetterTest: Fail          # Bug 5391976
-Label2NegativeTest: Crash                # Bug 5318228
-MethodInvocationTest: Fail               # Bug  5392266
-NullPointerExceptionTest: Fail           # Bug 5391976
-Private3Test: Fail                       # Bug 5391976
-Switch3NegativeTest: Crash               # Bug 5318228
-ToplevelCollision2Test/none: Fail        # Issue 647
-
-# Problems specific to dartc debug mode
-[ ($component == dartc || $component == chromium) && $mode == debug ]
-
-
 [ $component == dartc || $component == chromium ]
 
 # Marked failed after code generation removed from dartc
@@ -550,5 +534,3 @@ ConstructorRedirect2NegativeTest: Skip # Undiagnosed infinite loop.
 [ $arch == arm ]
 *: Skip
 
-[ $component == dartc && $mode == release ]
-*: Skip