🚨 Minor linting fixes/updates

The #746 PR got me curious about the current linting state.
Addressed few low hanging fruits.
Removed no longer relevant/addressed ignore rules.

kivy_ios/toolchain.py

@@ -1498,7 +1498,7 @@ def build_info(self):
                 if not callable(attr) and attr != 'archs':
                     print("{}: {}".format(attr, pformat(getattr(ctx, attr))))
         for arch in ctx.archs:
-            ul = '-' * (len(str(arch))+6)
+            ul = '-' * (len(str(arch)) + 6)
             print("\narch: {}\n{}".format(str(arch), ul))
             for attr in dir(arch):
                 if not attr.startswith("_"):

tox.ini

@@ -16,9 +16,7 @@ commands = flake8 kivy_ios/ tests/ .ci/ setup.py toolchain.py
 [flake8]
 ignore =
     E123,  # Closing bracket does not match indentation of opening bracket's line
-    E124,  # Closing bracket does not match visual indentation
     E126,  # Continuation line over-indented for hanging indent
-    E226,  # Missing whitespace around arithmetic operator
     E402,  # Module level import not at top of file
     E501,  # Line too long (82 > 79 characters)
     W503,  # Line break occurred before a binary operator