Remove remaining mention to complex shapers in the code

https://github.com/harfbuzz/harfbuzz/pull/3628#issuecomment-1146248037

src/hb-ot-shape-normalize.cc

@@ -69,7 +69,7 @@
  *   - When a font does not support a character but supports its canonical
  *     decomposition, well, use the decomposition.
  *
- *   - The complex shapers can customize the compose and decompose functions to
+ *   - The shapers can customize the compose and decompose functions to
  *     offload some of their requirements to the normalizer.  For example, the
  *     Indic shaper may want to disallow recomposing of two matras.
  */

src/hb-ot-shape.cc

@@ -927,7 +927,7 @@ hb_ot_substitute_default (const hb_ot_shape_context_t *c)
 }
 
 static inline void
-hb_ot_substitute_complex (const hb_ot_shape_context_t *c)
+hb_ot_substitute_plan (const hb_ot_shape_context_t *c)
 {
   hb_buffer_t *buffer = c->buffer;
 
@@ -946,7 +946,7 @@ hb_ot_substitute_pre (const hb_ot_shape_context_t *c)
 
   _hb_buffer_allocate_gsubgpos_vars (c->buffer);
 
-  hb_ot_substitute_complex (c);
+  hb_ot_substitute_plan (c);
 
 #ifndef HB_NO_AAT_SHAPE
   if (c->plan->apply_morx && c->plan->apply_gpos)
@@ -1039,7 +1039,7 @@ hb_ot_position_default (const hb_ot_shape_context_t *c)
 }
 
 static inline void
-hb_ot_position_complex (const hb_ot_shape_context_t *c)
+hb_ot_position_plan (const hb_ot_shape_context_t *c)
 {
   unsigned int count = c->buffer->len;
   hb_glyph_info_t *info = c->buffer->info;
@@ -1124,7 +1124,7 @@ hb_ot_position (const hb_ot_shape_context_t *c)
 
   hb_ot_position_default (c);
 
-  hb_ot_position_complex (c);
+  hb_ot_position_plan (c);
 
   if (HB_DIRECTION_IS_BACKWARD (c->buffer->props.direction))
     hb_buffer_reverse (c->buffer);

src/hb-subset-input.cc

@@ -152,7 +152,8 @@ hb_subset_input_create_or_fail (void)
     HB_TAG ('B', 'u', 'z', 'z'),
     HB_TAG ('B', 'U', 'Z', 'Z'),
 
-    //Complex shapers
+    //shapers
+
     //arabic
     HB_TAG ('i', 'n', 'i', 't'),
     HB_TAG ('m', 'e', 'd', 'i'),