Get rid of provide section since it is unnecessary

meson.build

 project('coeurl', 'cpp',
   version : '0.3.0',
   license : 'MIT',
-  meson_version : '>=0.54',
+  meson_version : '>=0.55',
   default_options : ['warning_level=3', 'cpp_std=c++17']
   )
 

subprojects/curl.wrap

@@ -4,6 +4,3 @@ directory = curl-7.77.0
 source_url = https://github.com/curl/curl/releases/download/curl-7_77_0/curl-7.77.0.tar.xz
 source_filename = curl-7.77.0.tar.xz
 source_hash = 0f64582c54282f31c0de9f0a1a596b182776bd4df9a4c4a2a41bbeb54f62594b
-
-[provide]
-dependency_names = libcurl