REXM: REMOVE: example: core_loading_thread

This example was POSIX only and had some special requirements for web, it made it more difficult to be managed from collection standard examples format.

It will be re-added in the `others` category, that is not processed for web.

examples/Makefile

@@ -525,7 +525,6 @@ CORE = \
     core/core_input_mouse_wheel \
     core/core_input_multitouch \
     core/core_input_virtual_controls \
-    core/core_loading_thread \
     core/core_random_sequence \
     core/core_random_values \
     core/core_scissor_test \
@@ -563,7 +562,6 @@ TEXTURES = \
     textures/textures_background_scrolling \
     textures/textures_blend_modes \
     textures/textures_bunnymark \
-    textures/textures_tiled_drawing \
     textures/textures_fog_of_war \
     textures/textures_gif_player \
     textures/textures_image_channel \
@@ -585,19 +583,20 @@ TEXTURES = \
     textures/textures_sprite_explosion \
     textures/textures_srcrec_dstrec \
     textures/textures_textured_curve \
+    textures/textures_tiled_drawing \
     textures/textures_to_image
 
 TEXT = \
-    text/text_codepoints_loading \
     text/text_3d_drawing \
+    text/text_codepoints_loading \
     text/text_font_filters \
     text/text_font_loading \
     text/text_font_sdf \
     text/text_font_spritefont \
     text/text_format_text \
     text/text_input_box \
-    text/text_sprite_fonts \
     text/text_rectangle_bounds \
+    text/text_sprite_fonts \
     text/text_unicode_emojis \
     text/text_unicode_ranges \
     text/text_writing_anim