[fsearch] remove obsolete offset tracking code

apps/fsearch/fsearch.cpp

@@ -37,9 +37,8 @@ void search(const std::string& path) {
 	}
 
 	std::array<char, EMPER_RIPGREP_BUFSIZE> buf;
-	off_t bytes_searched = 0;
 
-	ssize_t bytes_read = emper::io::readFileAndWait(fd, buf.data(), buf.size(), bytes_searched);
+	ssize_t bytes_read = emper::io::readFileAndWait(fd, buf.data(), buf.size(), 0);
 	while (bytes_read > 0) {
 		if (memmem(&buf[0], bytes_read, needle, needle_len)) {
 			std::array<char, PATH_MAX + 1> outBuf;
@@ -49,7 +48,6 @@ void search(const std::string& path) {
 			goto out;
 		}
 
-		bytes_searched += bytes_read;
 		bytes_read = emper::io::readFileAndWait(fd, buf.data(), buf.size(), -1);
 	}