Use "with suppress()" to suppress python exceptions

Using
```Python
with suppress(OSError):
    os.remove('somefile.tmp')
```
instead of
```Python
try:
    os.remove('somefile.tmp')
except OSError:
    pass
```
makes the code more compact and more readable IMO.

This pattern was recommended by Raymond Hettinger, a Python Core
Developer in his talk "Transforming Code into Beautiful, Idiomatic Python" at https://www.youtube.com/watch?v=OSGv2VnC0go. The transcript is available at https://github.com/JeffPaine/beautiful_idiomatic_python

kitty_tests/gr.py

@@ -6,6 +6,7 @@ import os
 import sys
 import zlib
 from base64 import standard_b64encode
+from contextlib import suppress
 
 write = getattr(sys.stdout, 'buffer', sys.stdout).write
 
@@ -62,10 +63,8 @@ def main():
     move_cursor(0, 21)
     print('Photo...')
     display_png_file(photo)
-    try:
+    with suppress(EOFError, KeyboardInterrupt):
         input()
-    except (EOFError, KeyboardInterrupt):
-        pass
 
 
 if __name__ == '__main__':