Remove unneded 'type: ignore' comments

The new version of mypy doesn't need some of our 'type: ignore' comments
that we currently have.

Author: pablogsal

src/memray/_ipython/flamegraph.py

@@ -227,7 +227,7 @@ def memray_flamegraph(self, line: str, cell: str) -> None:
             )
         dump_file.unlink()
         pprint(f"Results saved to [bold cyan]{flamegraph_path}")
-        display(IFrame(flamegraph_path, width="100%", height="600"))  # type: ignore
+        display(IFrame(flamegraph_path, width="100%", height="600"))
 
 
 assert FlamegraphMagics.memray_flamegraph.__doc__ is not None

src/memray/commands/__init__.py

@@ -10,7 +10,7 @@
 try:
     from typing import Protocol
 except ImportError:
-    from typing_extensions import Protocol  # type: ignore
+    from typing_extensions import Protocol
 
 from memray._errors import MemrayCommandError
 from memray._errors import MemrayError

src/memray/commands/attach.py

@@ -24,7 +24,7 @@
 try:
     from typing import Literal
 except ImportError:
-    from typing_extensions import Literal  # type: ignore
+    from typing_extensions import Literal
 
 TrackingMode = Literal["ACTIVATE", "DEACTIVATE", "FOR_DURATION"]