diff --git a/src/geometries/ExtrudeGeometry.js b/src/geometries/ExtrudeGeometry.js
index 3649caf9d805e2..96f12368dc579b 100644
--- a/src/geometries/ExtrudeGeometry.js
+++ b/src/geometries/ExtrudeGeometry.js
@@ -72,7 +72,7 @@ class ExtrudeGeometry extends BufferGeometry {
 
 			const curveSegments = options.curveSegments !== undefined ? options.curveSegments : 12;
 			const steps = options.steps !== undefined ? options.steps : 1;
-			let depth = options.depth !== undefined ? options.depth : 1;
+			const depth = options.depth !== undefined ? options.depth : 1;
 
 			let bevelEnabled = options.bevelEnabled !== undefined ? options.bevelEnabled : true;
 			let bevelThickness = options.bevelThickness !== undefined ? options.bevelThickness : 0.2;
@@ -84,15 +84,6 @@ class ExtrudeGeometry extends BufferGeometry {
 
 			const uvgen = options.UVGenerator !== undefined ? options.UVGenerator : WorldUVGenerator;
 
-			// deprecated options
-
-			if ( options.amount !== undefined ) {
-
-				console.warn( 'THREE.ExtrudeBufferGeometry: amount has been renamed to depth.' );
-				depth = options.amount;
-
-			}
-
 			//
 
 			let extrudePts, extrudeByPath = false;
diff --git a/src/loaders/ObjectLoader.js b/src/loaders/ObjectLoader.js
index 8e496def7e0e2c..9a1de2185efbea 100644
--- a/src/loaders/ObjectLoader.js
+++ b/src/loaders/ObjectLoader.js
@@ -1085,15 +1085,6 @@ class ObjectLoader extends Loader {
 
 	}
 
-	/* DEPRECATED */
-
-	setTexturePath( value ) {
-
-		console.warn( 'THREE.ObjectLoader: .setTexturePath() has been renamed to .setResourcePath().' );
-		return this.setResourcePath( value );
-
-	}
-
 }
 
 const TEXTURE_MAPPING = {
diff --git a/src/math/Quaternion.js b/src/math/Quaternion.js
index 6f38435266c1e7..0cd77dbb246d7b 100644
--- a/src/math/Quaternion.js
+++ b/src/math/Quaternion.js
@@ -13,13 +13,6 @@ class Quaternion {
 
 	}
 
-	static slerp( qa, qb, qm, t ) {
-
-		console.warn( 'THREE.Quaternion: Static .slerp() has been deprecated. Use qm.slerpQuaternions( qa, qb, t ) instead.' );
-		return qm.slerpQuaternions( qa, qb, t );
-
-	}
-
 	static slerpFlat( dst, dstOffset, src0, srcOffset0, src1, srcOffset1, t ) {
 
 		// fuzz-free, array-based Quaternion SLERP operation