src: remove unused variables

Example of warning by new clang:

runmodes.c:537:12: warning: variable 'file_logger_count' set but not used [-Wunused-but-set-global]
  537 | static int file_logger_count = 0;

src/detect-file-data.c

@@ -60,7 +60,6 @@ static void DetectFiledataRegisterTests(void);
 #endif
 static void DetectFiledataSetupCallback(
         const DetectEngineCtx *de_ctx, Signature *s, const DetectBufferType *map);
-static int g_file_data_buffer_id = 0;
 
 /* file API */
 int PrefilterMpmFiledataRegister(DetectEngineCtx *de_ctx, SigGroupHead *sgh, MpmCtx *mpm_ctx,
@@ -172,8 +171,6 @@ void DetectFiledataRegister(void)
 
     DetectBufferTypeSetDescriptionByName("file_data", "data from tracked files");
     DetectBufferTypeSupportsMultiInstance("file_data");
-
-    g_file_data_buffer_id = DetectBufferTypeGetByName("file_data");
 }
 
 static void SetupDetectEngineConfig(DetectEngineCtx *de_ctx) {

src/detect-filename.c

@@ -65,7 +65,6 @@ static int DetectFilenameSetupSticky(DetectEngineCtx *de_ctx, Signature *s, cons
 #ifdef UNITTESTS
 static void DetectFilenameRegisterTests(void);
 #endif
-static int g_file_match_list_id = 0;
 static int g_file_name_buffer_id = 0;
 
 static int PrefilterMpmFilenameRegister(DetectEngineCtx *de_ctx, SigGroupHead *sgh, MpmCtx *mpm_ctx,
@@ -105,7 +104,6 @@ void DetectFilenameRegister(void)
 
     DetectBufferTypeSetDescriptionByName("file.name", "file name");
 
-    g_file_match_list_id = DetectBufferTypeRegister("files");
     g_file_name_buffer_id = DetectBufferTypeRegister("file.name");
 
     SCLogDebug("registering filename rule option");

src/detect-uricontent.c

@@ -59,8 +59,6 @@
 static int DetectUricontentSetup(DetectEngineCtx *, Signature *, const char *);
 static void DetectUricontentFree(DetectEngineCtx *de_ctx, void *);
 
-static int g_http_uri_buffer_id = 0;
-
 /**
  * \brief Registration function for uricontent: keyword
  */
@@ -74,8 +72,6 @@ void DetectUricontentRegister (void)
     sigmatch_table[DETECT_URICONTENT].Free = DetectUricontentFree;
     sigmatch_table[DETECT_URICONTENT].flags = (SIGMATCH_QUOTES_MANDATORY|SIGMATCH_HANDLE_NEGATION);
     sigmatch_table[DETECT_URICONTENT].alternative = DETECT_HTTP_URI;
-
-    g_http_uri_buffer_id = DetectBufferTypeRegister("http_uri");
 }
 
 /**

src/runmodes.c

@@ -534,7 +534,6 @@ static void RunOutputFreeList(void)
     }
 }
 
-static int file_logger_count = 0;
 static int filedata_logger_count = 0;
 
 int RunModeOutputFiledataEnabled(void)
@@ -588,7 +587,6 @@ void RunModeShutDown(void)
     OutputClearActiveLoggers();
 
     /* Reset logger counts. */
-    file_logger_count = 0;
     filedata_logger_count = 0;
 }
 
@@ -656,7 +654,6 @@ static void SetupOutput(
         SCLogDebug("%s is a file logger", module->name);
         SCOutputRegisterFileLogger(module->logger_id, module->name, module->FileLogFunc, output_ctx,
                 module->ThreadInit, module->ThreadDeinit);
-        file_logger_count++;
     } else if (module->StreamingLogFunc) {
         SCLogDebug("%s is a streaming logger", module->name);
         SCOutputRegisterStreamingLogger(module->logger_id, module->name, module->StreamingLogFunc,

src/source-lib.c

@@ -27,9 +27,6 @@
 #include "source-lib.h"
 #include "util-device-private.h"
 
-/* Set time to the first packet timestamp when replaying a PCAP. */
-static bool time_set = false;
-
 /** \brief initialize the "Decode" module.
  *
  * \param tv                    Pointer to the per-thread structure.
@@ -65,7 +62,6 @@ static TmEcode DecodeLibThreadDeinit(ThreadVars *tv, void *data)
     if (data != NULL)
         DecodeThreadVarsFree(tv, data);
 
-    time_set = false;
     SCReturnInt(TM_ECODE_OK);
 }