Remove Git version logging and related plugin

Removed the `printVersion` method from `PlayerUtils.java` and eliminated the `gradle-git-properties` plugin from `build.gradle.kts`. These changes simplify the project setup by removing unnecessary Git version logging dependencies.

build.gradle.kts

@@ -1,7 +1,6 @@
 plugins {
     id("java")
     id("maven-publish")
-    id("com.gorylenko.gradle-git-properties") version "2.3.1"
 }
 
 group = "com.alttd"
@@ -12,14 +11,10 @@ apply<JavaLibraryPlugin>()
 
 java {
     toolchain {
-        languageVersion.set(JavaLanguageVersion.of(17))
+        languageVersion.set(JavaLanguageVersion.of(21))
     }
 }
 
-gitProperties {
-    keys = listOf("git.commit.id", "git.commit.time")
-}
-
 tasks {
     withType<JavaCompile> {
         options.encoding = Charsets.UTF_8.name()
@@ -43,7 +38,7 @@ tasks {
 }
 
 dependencies {
-    compileOnly("com.alttd:Galaxy-API:1.20.4-R0.1-SNAPSHOT") {
+    compileOnly("com.alttd:Galaxy-API:1.21-R0.1-SNAPSHOT") {
         isChanging = true
     }
 }

src/main/java/com/alttd/playerutils/PlayerUtils.java

@@ -26,20 +26,6 @@ public final class PlayerUtils extends JavaPlugin {
         registerCommands();
         registerEvents();
         reloadConfigs();
-        printVersion();
-    }
-
-    private void printVersion() {
-        Properties gitProps = new Properties();
-        try (InputStream inputStream = getClass().getClassLoader().getResourceAsStream("git.properties")) {
-            gitProps.load(inputStream);
-        } catch (IOException e) {
-            logger.severe("Unable to load git.properties, unknown version");
-            return;
-        }
-
-        logger.info("Git commit ID: %s".formatted(gitProps.getProperty("git.commit.id")));
-        logger.info("Git commit time: %s".formatted(gitProps.getProperty("git.commit.time")));
     }
 
     @Override