Remove duplicate test cases

Author: JukkaL

mypyc/test-data/irbuild-int.test

@@ -192,8 +192,6 @@ def unary_plus(n: int) -> int:
 def unary_invert(n: int) -> int:
     x = ~n
     return x
-def unary_not(n: int) -> bool:
-    return not n
 [out]
 def unary_minus(n):
     n, r0, x :: int
@@ -212,9 +210,3 @@ L0:
     r0 = CPyTagged_Invert(n)
     x = r0
     return x
-def unary_not(n):
-    n :: int
-    r0 :: bit
-L0:
-    r0 = int_eq n, 0
-    return r0

mypyc/test-data/irbuild-str.test

@@ -180,10 +180,6 @@ def is_true(x: Union[str, NewStr]) -> bool:
         return True
     else:
         return False
-def unary_not(x: Union[str, NewStr]) -> bool:
-    return not x
-def unary_not_optional(x: Union[str, None]) -> bool:
-    return not x
 [typing fixtures/typing-full.pyi]
 [out]
 def is_true(x):
@@ -198,34 +194,6 @@ L2:
     return 0
 L3:
     unreachable
-def unary_not(x):
-    x :: str
-    r0, r1 :: bit
-L0:
-    r0 = CPyStr_IsTrue(x)
-    r1 = r0 ^ 1
-    return r1
-def unary_not_optional(x):
-    x :: union[str, None]
-    r0 :: object
-    r1, r2 :: bit
-    r3 :: str
-    r4, r5 :: bit
-L0:
-    r0 = load_address _Py_NoneStruct
-    r1 = x == r0
-    if r1 goto L1 else goto L2 :: bool
-L1:
-    r2 = 1
-    goto L3
-L2:
-    r3 = unchecked borrow cast(str, x)
-    r4 = CPyStr_IsTrue(r3)
-    r5 = r4 ^ 1
-    r2 = r5
-L3:
-    keep_alive x
-    return r2
 
 [case testStringFormatMethod]
 from typing import NewType, Union