Remove capitalize() method

Kotlin already has a capitalize() method - we don't need to define our
own.

deob/src/main/java/dev/openrs2/deob/remap/TypedRemapper.java

@@ -10,9 +10,9 @@ import dev.openrs2.asm.MemberDesc;
 import dev.openrs2.asm.MemberRef;
 import dev.openrs2.asm.classpath.ClassMetadata;
 import dev.openrs2.asm.classpath.ClassPath;
-import dev.openrs2.util.StringUtils;
 import dev.openrs2.util.StringUtilsKt;
 import dev.openrs2.util.collect.DisjointSet;
+import kotlin.text.StringsKt;
 import org.objectweb.asm.Type;
 import org.objectweb.asm.commons.Remapper;
 import org.slf4j.Logger;
@@ -166,7 +166,7 @@ public final class TypedRemapper extends Remapper {
 				throw new IllegalArgumentException("Unknown field type " + type);
 			}
 
-			prefix = StringUtilsKt.indefiniteArticle(prefix) + StringUtils.capitalize(prefix);
+			prefix = StringUtilsKt.indefiniteArticle(prefix) + StringsKt.capitalize(prefix);
 
 			var mappedName = generateName(prefixes, prefix);
 			for (var field : partition) {

util/src/main/java/dev/openrs2/util/StringUtils.kt

@@ -9,10 +9,3 @@ fun CharSequence.indefiniteArticle(): String {
         else -> "a"
     }
 }
-
-object StringUtils {
-    @JvmStatic
-    fun capitalize(str: String): String {
-        return str.capitalize()
-    }
-}

util/src/test/java/dev/openrs2/util/StringUtilsTest.kt

@@ -1,6 +1,5 @@
 package dev.openrs2.util
 
-import dev.openrs2.util.StringUtils.capitalize
 import kotlin.test.Test
 import kotlin.test.assertEquals
 import kotlin.test.assertFailsWith
@@ -14,10 +13,4 @@ object StringUtilsTest {
             "".indefiniteArticle()
         }
     }
-
-    @Test
-    fun testCapitalize() {
-        assertEquals("Hello", capitalize("hello"))
-        assertEquals("", capitalize(""))
-    }
 }