remove type statement restrictions unsupported by spec or PEP

Author: carljm

conformance/tests/aliases_type_statement.py

@@ -48,15 +48,6 @@ def func2(x: object):
 type BadTypeAlias12 = list or set  # E
 type BadTypeAlias13 = f"{'int'}"  # E
 
-type BadTypeAlias14 = int  # E[TA14]: redeclared
-type BadTypeAlias14 = int  # E[TA14]: redeclared
-
-
-def func3():
-    type BadTypeAlias15 = int  # E: alias not allowed in function
-
-
-
 V = TypeVar("V")
 
 type TA1[K] = dict[K, V] # E: combines old and new TypeVars