Revert "Fix particles emitting at old location"

(cherry picked from commit ee1877e63ec72790ff7532ffafbf9413be77dad1)

drivers/gles3/rasterizer_storage_gles3.cpp

@@ -6115,9 +6115,6 @@ void RasterizerStorageGLES3::particles_set_emitting(RID p_particles, bool p_emit
 	Particles *particles = particles_owner.getornull(p_particles);
 	ERR_FAIL_COND(!particles);
 
-	if (p_emitting && !particles->emitting) {
-		particles_request_process(p_particles);
-	}
 	particles->emitting = p_emitting;
 }