cleanup TSRMLS_C macro

- only used on PHP 5 (not supported by this ext.)
- not needed on PHP 7
- removed from PHP 8

php_pdlib.h

@@ -66,13 +66,13 @@ ZEND_TSRMLS_CACHE_EXTERN()
     /* Tries to find given key in array */ \
     data##key = zend_hash_str_find(hashtable, #key, sizeof(#key)-1); \
     if (data##key == nullptr) { \
-        zend_throw_exception_ex(zend_ce_exception, 0 TSRMLS_CC, #error_key_missing); \
+        zend_throw_exception_ex(zend_ce_exception, 0, #error_key_missing); \
         return; \
     } \
     \
     /* We also need to check proper type of value in associative array */ \
     if (Z_TYPE_P(data##key) != IS_LONG) { \
-        zend_throw_exception_ex(zend_ce_exception, 0 TSRMLS_CC, #error_key_not_long); \
+        zend_throw_exception_ex(zend_ce_exception, 0, #error_key_not_long); \
         return; \
     } \
     zend_long key = Z_LVAL_P(data##key); \