render: remove return in wlr_texture_get_size

Otherwise this error happens:

    ../subprojects/wlroots/render/wlr_texture.c: In function ‘wlr_texture_get_size’:
    ../subprojects/wlroots/render/wlr_texture.c:47:9: error: ISO C forbids ‘return’ with expression, in function returning void [-Werror=pedantic]
       47 |  return texture->impl->get_size(texture, width, height);
          |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    ../subprojects/wlroots/render/wlr_texture.c:45:6: note: declared here
       45 | void wlr_texture_get_size(struct wlr_texture *texture, int *width,
          |      ^~~~~~~~~~~~~~~~~~~~

0 files changed, 0 insertions, 0 deletions