Clean up old TODO comments

All issues mentioned in the TODO comments are completed. We forgot to remove the comments

Author: alinaliBQ

cpp/src/arrow/flight/sql/odbc/odbc_api.cc

@@ -41,11 +41,7 @@ SQLRETURN SQLAllocHandle(SQLSMALLINT type, SQLHANDLE parent, SQLHANDLE* result)
   ARROW_LOG(DEBUG) << "SQLAllocHandle called with type: " << type
                    << ", parent: " << parent
                    << ", result: " << static_cast<const void*>(result);
-  // GH-47706 TODO: Add tests for SQLAllocStmt, pre-requisite requires
-  // SQLDriverConnect implementation
-
   *result = nullptr;
-
   switch (type) {
     case SQL_HANDLE_ENV: {
       using ODBC::ODBCEnvironment;
@@ -141,9 +137,6 @@ SQLRETURN SQLAllocHandle(SQLSMALLINT type, SQLHANDLE parent, SQLHANDLE* result)
 SQLRETURN SQLFreeHandle(SQLSMALLINT type, SQLHANDLE handle) {
   ARROW_LOG(DEBUG) << "SQLFreeHandle called with type: " << type
                    << ", handle: " << handle;
-  // GH-47706 TODO: Add tests for SQLFreeStmt, pre-requisite requires
-  // SQLAllocStmt tests
-
   switch (type) {
     case SQL_HANDLE_ENV: {
       using ODBC::ODBCEnvironment;
@@ -234,7 +227,6 @@ SQLRETURN SQLFreeStmt(SQLHSTMT handle, SQLUSMALLINT option) {
     }
 
     case SQL_UNBIND: {
-      // GH-47716 TODO: Add tests for SQLBindCol unbinding
       using ODBC::ODBCDescriptor;
       using ODBC::ODBCStatement;
       return ODBCStatement::ExecuteWithDiagnostics(handle, SQL_ERROR, [=]() {
@@ -280,7 +272,6 @@ SQLRETURN SQLGetDiagField(SQLSMALLINT handle_type, SQLHANDLE handle,
                    << ", diag_info_ptr: " << diag_info_ptr
                    << ", buffer_length: " << buffer_length << ", string_length_ptr: "
                    << static_cast<const void*>(string_length_ptr);
-  // GH-46575 TODO: Add tests for SQLGetDiagField
   using ODBC::GetStringAttribute;
   using ODBC::ODBCConnection;
   using ODBC::ODBCDescriptor;
@@ -545,7 +536,6 @@ SQLRETURN SQLGetDiagRec(SQLSMALLINT handle_type, SQLHANDLE handle, SQLSMALLINT r
                    << ", message_text: " << static_cast<const void*>(message_text)
                    << ", buffer_length: " << buffer_length
                    << ", text_length_ptr: " << static_cast<const void*>(text_length_ptr);
-  // GH-46575 TODO: Add tests for SQLGetDiagRec
   using arrow::flight::sql::odbc::Diagnostics;
   using ODBC::GetStringAttribute;
   using ODBC::ODBCConnection;