vec: deprecate glm_vec_inv and glm_vec4_inv

* because in the current implementation, `glm_vec3_negate` does same thing. It is duplicate.

src/vec3.c

@@ -158,18 +158,6 @@ glmc_vec3_negate_to(vec3 v, vec3 dest) {
   glm_vec3_negate_to(v, dest);
 }
 
-CGLM_EXPORT
-void
-glmc_vec3_inv(vec3 v) {
-  glm_vec3_inv(v);
-}
-
-CGLM_EXPORT
-void
-glmc_vec3_inv_to(vec3 v, vec3 dest) {
-  glm_vec3_inv_to(v, dest);
-}
-
 CGLM_EXPORT
 float
 glmc_vec3_angle(vec3 v1, vec3 v2) {

src/vec4.c

@@ -164,18 +164,6 @@ glmc_vec4_negate_to(vec4 v, vec4 dest) {
   glm_vec4_negate_to(v, dest);
 }
 
-CGLM_EXPORT
-void
-glmc_vec4_inv(vec4 v) {
-  glm_vec4_inv(v);
-}
-
-CGLM_EXPORT
-void
-glmc_vec4_inv_to(vec4 v, vec4 dest) {
-  glm_vec4_inv_to(v, dest);
-}
-
 CGLM_EXPORT
 float
 glmc_vec4_distance(vec4 v1, vec4 v2) {