Remove unused Utilities-OG API

.gitmodules

@@ -1,3 +0,0 @@
-[submodule "libs/Utilities-OG"]
-	path = libs/Utilities-OG
-	url = https://github.com/true-og/Utilities-OG

build.gradle.kts

@@ -49,7 +49,6 @@ repositories {
 /* ---------------------- Java project deps ---------------------------- */
 dependencies {
     compileOnly("org.purpurmc.purpur:purpur-api:1.19.4-R0.1-SNAPSHOT") // Declare Purpur API version to be packaged.
-    compileOnlyApi(project(":libs:Utilities-OG")) // Import TrueOG Network Utilities-OG Java API (from source).
 }
 
 apply(from = "eclipse.gradle.kts") // Import eclipse classpath support script.