Clean up some code

- Use good ELF technique in cosmo_dlopen()
- Make strerror() conform more to other libc impls
- Introduce __clear_cache() and use it in cosmo_dlopen()
- Remove libc/fmt/fmt.h header (trying to kill off LIBC_FMT)

third_party/python/Modules/_datetimemodule.c

@@ -6,7 +6,6 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/assert.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/math.h"
 #include "libc/time/struct/tm.h"
 #include "third_party/python/Include/abstract.h"

third_party/python/Modules/_decimal/_decimal.c

@@ -27,7 +27,6 @@
 │ OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,            │
 │ EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.                           │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/fmt.h"
 #include "third_party/python/Include/abstract.h"
 #include "third_party/python/Include/boolobject.h"
 #include "third_party/python/Include/complexobject.h"

third_party/python/Modules/_decimal/libmpdec/io.c

@@ -28,7 +28,6 @@
 │ EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.                           │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/errno.h"
-#include "libc/fmt/fmt.h"
 #include "libc/str/locale.h"
 #include "libc/str/unicode.h"
 #include "third_party/python/Modules/_decimal/libmpdec/bits.h"

third_party/python/Modules/_testcapimodule.c

@@ -9,7 +9,6 @@
 #include "libc/calls/calls.h"
 #include "libc/calls/weirdtypes.h"
 #include "libc/errno.h"
-#include "libc/fmt/fmt.h"
 #include "libc/limits.h"
 #include "libc/math.h"
 #include "libc/mem/mem.h"

third_party/python/Modules/pyexpat.c

@@ -5,7 +5,6 @@
 │ https://docs.python.org/3/license.html                                       │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "third_party/python/Include/pyexpat.h"
-#include "libc/fmt/fmt.h"
 #include "third_party/python/Include/abstract.h"
 #include "third_party/python/Include/boolobject.h"
 #include "third_party/python/Include/bytearrayobject.h"

third_party/python/Modules/unicodedata.c

@@ -6,7 +6,6 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #define PY_SSIZE_T_CLEAN
 #include "third_party/python/Modules/unicodedata.h"
-#include "libc/fmt/fmt.h"
 #include "libc/nexgen32e/kompressor.h"
 #include "third_party/python/Include/floatobject.h"
 #include "third_party/python/Include/import.h"

third_party/python/Modules/unicodedata_getcode.c

@@ -4,7 +4,6 @@
 │ Python 3                                                                     │
 │ https://docs.python.org/3/license.html                                       │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/fmt.h"
 #include "third_party/python/Include/pyctype.h"
 #include "third_party/python/Include/pyerrors.h"
 #include "third_party/python/Include/pymacro.h"