Everywhere: Remove redundant inequality comparison operators

C++20 can automatically synthesize `operator!=` from `operator==`, so
there is no point in writing such functions by hand if all they do is
call through to `operator==`.

This fixes a compile error with compilers that implement P2468 (Clang
16 currently). This paper restores the C++17 behavior that if both
`T::operator==(U)` and `T::operator!=(U)` exist, `U == T` won't be
rewritten in reverse to call `T::operator==(U)`. Removing `!=` operators
makes the rewriting possible again.
See https://reviews.llvm.org/D134529#3853062

1 files changed, 0 insertions, 5 deletions

diff --git a/Userland/Libraries/LibWeb/CSS/Resolution.h b/Userland/Libraries/LibWeb/CSS/Resolution.h
index 589d070509..be17e56431 100644
--- a/Userland/Libraries/LibWeb/CSS/Resolution.h
+++ b/Userland/Libraries/LibWeb/CSS/Resolution.h
@@ -32,11 +32,6 @@ public:
         return m_type == other.m_type && m_value == other.m_value;
     }
 
-    bool operator!=(Resolution const& other) const
-    {
-        return !(*this == other);
-    }
-
 private:
     StringView unit_name() const;