AK: Remove unused ByteString titlecase/invert case conversions

Author: https://github.com/trflynn89
Commit: https://github.com/LadybirdBrowser/ladybird/commit/05627b6f45f
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/4253

AK/ByteString.cpp

@@ -371,16 +371,6 @@ ByteString ByteString::to_snakecase() const
     return StringUtils::to_snakecase(*this);
 }
 
-ByteString ByteString::to_titlecase() const
-{
-    return StringUtils::to_titlecase(*this);
-}
-
-ByteString ByteString::invert_case() const
-{
-    return StringUtils::invert_case(*this);
-}
-
 bool ByteString::operator==(char const* cstring) const
 {
     if (!cstring)

AK/ByteString.h

@@ -136,8 +136,6 @@ public:
     [[nodiscard]] ByteString to_lowercase() const;
     [[nodiscard]] ByteString to_uppercase() const;
     [[nodiscard]] ByteString to_snakecase() const;
-    [[nodiscard]] ByteString to_titlecase() const;
-    [[nodiscard]] ByteString invert_case() const;
 
     [[nodiscard]] bool is_whitespace() const { return StringUtils::is_whitespace(*this); }
 

AK/StringUtils.cpp

@@ -504,20 +504,6 @@ ByteString to_titlecase(StringView str)
     return builder.to_byte_string();
 }
 
-ByteString invert_case(StringView str)
-{
-    StringBuilder builder(str.length());
-
-    for (auto ch : str) {
-        if (is_ascii_lower_alpha(ch))
-            builder.append(to_ascii_uppercase(ch));
-        else
-            builder.append(to_ascii_lowercase(ch));
-    }
-
-    return builder.to_byte_string();
-}
-
 // Finishes the replacing algorithm once it is known that ita least one
 // replacemnet is going to be done. Otherwise the caller may want to follow a
 // different route to construct its output.

AK/StringUtils.h

@@ -106,7 +106,6 @@ Optional<size_t> find_any_of(StringView haystack, StringView needles, SearchDire
 
 ByteString to_snakecase(StringView);
 ByteString to_titlecase(StringView);
-ByteString invert_case(StringView);
 
 ByteString replace(StringView, StringView needle, StringView replacement, ReplaceMode);
 ErrorOr<String> replace(String const&, StringView needle, StringView replacement, ReplaceMode);