tidy: Disable "readability-redundant-inline-specifier"

Disable the "readability-redundant-inline-specifier" check.
It is actually nice, but clang actually treats the inline keyword
as the inlining hint, so this must be investigated further.

Author: chfast

.clang-tidy

@@ -64,6 +64,8 @@ Checks:
   - "-readability-magic-numbers"
   - "-readability-named-parameter"
   - "-readability-qualified-auto"
+  # TODO: Check if removing inline affects clang optimized builds.
+  - "-readability-redundant-inline-specifier"
   - "-readability-uppercase-literal-suffix"
 
 CheckOptions: