Remove unnecessary `mut` everywhere

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/merge_requests/1273>

4 files changed, 9 insertions, 9 deletions

diff --git a/video/closedcaption/src/jsontovtt/imp.rs b/video/closedcaption/src/jsontovtt/imp.rs
index b74510ada..3f096574c 100644
--- a/video/closedcaption/src/jsontovtt/imp.rs
+++ b/video/closedcaption/src/jsontovtt/imp.rs
@@ -205,7 +205,7 @@ impl State {
 
             /* Collect cues, fixing up their duration based on the next cue */
             while let Some(lines) = self.pending.front() {
-                if let Some(mut drained_line) = drained_lines.back_mut() {
+                if let Some(drained_line) = drained_lines.back_mut() {
                     drained_line.duration = lines.pts - drained_line.pts;
                 }
 
@@ -219,7 +219,7 @@ impl State {
             }
 
             /* cues that end a fragment must be clipped and cloned for the next fragment */
-            if let Some(mut drained_line) = drained_lines.back_mut() {
+            if let Some(drained_line) = drained_lines.back_mut() {
                 /* Clip to either the requested PTS, or segment stop if specified */
                 let end_pts = if running_time.is_none() {
                     self.last_pts.unwrap()
diff --git a/video/closedcaption/src/mcc_parse/imp.rs b/video/closedcaption/src/mcc_parse/imp.rs
index 130d39389..11c57e72c 100644
--- a/video/closedcaption/src/mcc_parse/imp.rs
+++ b/video/closedcaption/src/mcc_parse/imp.rs
@@ -725,7 +725,7 @@ impl MccParse {
             ref mut pull,
             ..
         } = *state;
-        let mut pull = pull.as_mut().unwrap();
+        let pull = pull.as_mut().unwrap();
         let scan_tc_rate = tc_rate.is_none() && pull.duration.is_none();
         let offset = pull.offset;
 
@@ -763,12 +763,12 @@ impl MccParse {
                     match self.scan_duration() {
                         Ok(Some(tc)) => {
                             let mut state = self.state.lock().unwrap();
-                            let mut pull = state.pull.as_mut().unwrap();
+                            let pull = state.pull.as_mut().unwrap();
                             pull.duration = Some(tc.time_since_daily_jam());
                         }
                         Ok(None) => {
                             let mut state = self.state.lock().unwrap();
-                            let mut pull = state.pull.as_mut().unwrap();
+                            let pull = state.pull.as_mut().unwrap();
                             pull.duration = Some(gst::ClockTime::ZERO);
                         }
                         Err(err) => {
diff --git a/video/closedcaption/src/scc_parse/imp.rs b/video/closedcaption/src/scc_parse/imp.rs
index 841fb8d69..6fda83b0b 100644
--- a/video/closedcaption/src/scc_parse/imp.rs
+++ b/video/closedcaption/src/scc_parse/imp.rs
@@ -625,7 +625,7 @@ impl SccParse {
             ref mut pull,
             ..
         } = *state;
-        let mut pull = pull.as_mut().unwrap();
+        let pull = pull.as_mut().unwrap();
         let scan_duration = framerate.is_none() && pull.duration.is_none();
         let offset = pull.offset;
 
@@ -662,12 +662,12 @@ impl SccParse {
                     match self.scan_duration() {
                         Ok(Some(tc)) => {
                             let mut state = self.state.lock().unwrap();
-                            let mut pull = state.pull.as_mut().unwrap();
+                            let pull = state.pull.as_mut().unwrap();
                             pull.duration = Some(tc.time_since_daily_jam());
                         }
                         Ok(None) => {
                             let mut state = self.state.lock().unwrap();
-                            let mut pull = state.pull.as_mut().unwrap();
+                            let pull = state.pull.as_mut().unwrap();
                             pull.duration = Some(gst::ClockTime::ZERO);
                         }
                         Err(err) => {
diff --git a/video/closedcaption/src/tttocea608/imp.rs b/video/closedcaption/src/tttocea608/imp.rs
index 75d1000c3..469f1d630 100644
--- a/video/closedcaption/src/tttocea608/imp.rs
+++ b/video/closedcaption/src/tttocea608/imp.rs
@@ -488,7 +488,7 @@ impl TtToCea608 {
 
     fn generate(
         &self,
-        mut state: &mut State,
+        state: &mut State,
         settings: &Settings,
         pts: gst::ClockTime,
         duration: gst::ClockTime,