Remove single underscore version defines

These were inconsistent and have been deprecated for a long time.

Signed-off-by: Keith Packard <[email protected]>

Author: keith-packard

meson.build

@@ -1509,14 +1509,7 @@ conf_data.set('__PICOLIBC__', version_array[0], description: 'The Picolibc major
 conf_data.set('__PICOLIBC_MINOR__', version_array[1], description: 'The Picolibc minor version number.')
 conf_data.set('__PICOLIBC_PATCHLEVEL__', picolibc_patch_level, description: 'The Picolibc patch level.')
 
-# Old version macros. These have just a single leading underscore,
-# which isn't consistent with the newlib macros; they were created
-# by mistake.
-conf_data.set('_PICOLIBC_VERSION', '"@0@"'.format(meson.project_version()), description: 'The Picolibc version in string format.')
-conf_data.set('_PICOLIBC__', version_array[0], description: 'The Picolibc major version number.')
-conf_data.set('_PICOLIBC_MINOR__', version_array[1], description: 'The Picolibc minor version number.')
-
-conf_data.set('_NEWLIB_VERSION', '"@0@"'.format(NEWLIB_VERSION), description: 'The newlib version in string format.')
+conf_data.set('__NEWLIB_VERSION__', '"@0@"'.format(NEWLIB_VERSION), description: 'The newlib version in string format.')
 conf_data.set('__NEWLIB__', NEWLIB_MAJOR_VERSION, description: 'The newlib major version number.')
 conf_data.set('__NEWLIB_MINOR__', NEWLIB_MINOR_VERSION, description: 'The newlib minor version number.')
 conf_data.set('__NEWLIB_PATCHLEVEL__', NEWLIB_PATCHLEVEL_VERSION, description: 'The newlib patch level.')