diff --git a/build.gradle.kts b/build.gradle.kts
index e07e0ea..d38f34e 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -48,63 +48,26 @@ spotless {
     indentWithSpaces(2)
     endWithNewline()
   }
-  val externalJavaFiles = arrayOf(
-    "**/ClassFactory.java",
-    "**/Iso8601Utils.java",
-    "**/JsonReader.java",
-    "**/JsonReaderPathTest.java",
-    "**/JsonReaderTest.java",
-    "**/JsonScope.java",
-    "**/JsonUtf8Reader.java",
-    "**/JsonUtf8ReaderPathTest.java",
-    "**/JsonUtf8ReaderTest.java",
-    "**/JsonUtf8ReaderTest.java",
-    "**/JsonUtf8Writer.java",
-    "**/JsonUtf8WriterTest.java",
-    "**/JsonWriter.java",
-    "**/JsonWriterPathTest.java",
-    "**/JsonWriterTest.java",
-    "**/LinkedHashTreeMap.java",
-    "**/LinkedHashTreeMapTest.java",
-    "**/PolymorphicJsonAdapterFactory.java",
-    "**/RecursiveTypesResolveTest.java",
-    "**/Types.java",
-    "**/TypesTest.java"
-  )
   val configureCommonJavaFormat: JavaExtension.() -> Unit = {
     googleJavaFormat(libs.versions.gjf.get())
   }
   java {
     configureCommonJavaFormat()
     target("**/*.java")
-    targetExclude(
-      "**/spotless.java",
-      "**/build/**",
-      *externalJavaFiles
-    )
-    licenseHeaderFile("spotless/spotless.java")
-  }
-  format("externalJava", JavaExtension::class.java) {
-    // These don't use our spotless config for header files since we don't want to overwrite the
-    // existing copyright headers.
-    configureCommonJavaFormat()
-    target(*externalJavaFiles)
+    targetExclude("**/build/**",)
   }
   kotlin {
     ktlint(libs.versions.ktlint.get()).userData(mapOf("indent_size" to "2"))
     target("**/*.kt")
     trimTrailingWhitespace()
     endWithNewline()
-    licenseHeaderFile("spotless/spotless.kt")
-      .updateYearWithLatest(false)
-    targetExclude("**/Dependencies.kt", "**/spotless.kt", "**/build/**")
+    targetExclude("**/Dependencies.kt", "**/build/**")
   }
   kotlinGradle {
     ktlint(libs.versions.ktlint.get()).userData(mapOf("indent_size" to "2"))
     target("**/*.gradle.kts")
     trimTrailingWhitespace()
     endWithNewline()
-    licenseHeaderFile("spotless/spotless.kts", "(import|plugins|buildscript|dependencies|pluginManagement)")
   }
 }
 
diff --git a/spotless/spotless.java b/spotless/spotless.java
deleted file mode 100644
index e6223bc..0000000
--- a/spotless/spotless.java
+++ /dev/null
@@ -1,15 +0,0 @@
-/*
- * Copyright (C) $YEAR Square, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *    https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
diff --git a/spotless/spotless.kt b/spotless/spotless.kt
deleted file mode 100644
index e6223bc..0000000
--- a/spotless/spotless.kt
+++ /dev/null
@@ -1,15 +0,0 @@
-/*
- * Copyright (C) $YEAR Square, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *    https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
diff --git a/spotless/spotless.kts b/spotless/spotless.kts
deleted file mode 100644
index 387b973..0000000
--- a/spotless/spotless.kts
+++ /dev/null
@@ -1,16 +0,0 @@
-/*
- * Copyright (C) $YEAR Square, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *    https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-