Python: Delete orphaned `.expected` files

python/ql/test/experimental/dataflow/regression/pointsto.expected

@@ -1 +0,0 @@
-| pointsto_regressions.py:15:18:15:21 | ControlFlowNode for self | pointsto_regressions.py:19:9:19:12 | ControlFlowNode for self |

python/ql/test/query-tests/Expressions/general/ExplcitCallToDel.expected

@@ -1 +0,0 @@
-Failure

python/ql/test/query-tests/Statements/ReturnOrYieldOutsideOfFunction/ReturnOrYieldOutsideOfFunction.expected

@@ -1,9 +0,0 @@
-| ReturnOrYieldOutsideOfFunction_test.py:31:9:31:23 | Return | 'return' is used outside of a function. |
-| ReturnOrYieldOutsideOfFunction_test.py:36:9:36:15 | Yield | 'yield' is used outside of a function. |
-| ReturnOrYieldOutsideOfFunction_test.py:41:9:41:25 | YieldFrom | 'yield from' is used outside of a function. |
-| ReturnOrYieldOutsideOfFunction_test.py:45:5:45:12 | Return | 'return' is used outside of a function. |
-| ReturnOrYieldOutsideOfFunction_test.py:49:5:49:11 | Yield | 'yield' is used outside of a function. |
-| ReturnOrYieldOutsideOfFunction_test.py:53:5:53:16 | YieldFrom | 'yield from' is used outside of a function. |
-| ReturnOrYieldOutsideOfFunction_test.py:57:1:57:14 | YieldFrom | 'yield from' is used outside of a function. |
-| ReturnOrYieldOutsideOfFunction_test.py:60:1:60:12 | Return | 'return' is used outside of a function. |
-| ReturnOrYieldOutsideOfFunction_test.py:63:1:63:11 | Yield | 'yield' is used outside of a function. |