fc_sort: cleanup warnings caught by clang tidy / static analyzer.

Value stored to 'i' is never read.
Variable 'j' is never used.

Bug: 26936282
Test: WITH_TIDY=1 WITH_STATIC_ANALYZER=1 mm
Change-Id: I8dd266e639d089efd1fb1e1e0fca3899cf2a1553

tools/fc_sort/fc_sort.c

@@ -315,7 +315,7 @@ int main(int argc, char *argv[])
 {
 	int lines;
 	size_t start, finish, regex_len, context_len;
-	size_t line_len, buf_len, i, j;
+	size_t line_len, buf_len, i;
 	char *input_name, *output_name, *line_buf;
 
 	file_context_node_t *temp;
@@ -336,7 +336,7 @@ int main(int argc, char *argv[])
 	input_name = argv[1];
 	output_name = (argc >= 3) ? argv[2] : NULL;
 
-	i = j = lines = 0;
+	lines = 0;
 
 	/* Open the input file. */
 	if (!(in_file = fopen(input_name, "r"))) {