fix[995]: Delete motoko/http_counter directory (#1011)

* Delete motoko/http_counter directory

The example is pretty outdated. It is in the bottom 40 samples and I don't think it provides any value compared in addition to what we already have.

* .

* .

Author: rumenov

.github/CODEOWNERS

@@ -19,7 +19,6 @@
 /motoko/encrypted-notes-dapp-vetkd/ @dfinity/crypto-team
 /motoko/encrypted-notes-dapp/ @dfinity/crypto-team
 /motoko/hello_cycles/ @dfinity/languages
-/motoko/http_counter/ @dfinity/networking
 /motoko/ic-pos/ @dfinity/div-Crypto
 /motoko/icrc2-swap/ @dfinity/div-Crypto
 /motoko/internet_identity_integration/ @dfinity/gix