[chore] Remove repetitive words (jaegertracing#5265)

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## Which problem is this PR solving?
- <!-- Example: Resolves jaegertracing#123 -->

## Description of the changes
-  remove repetitive words

## How was this change tested?
- 

## Checklist
- [x] I have read
https://github.com/jaegertracing/jaeger/blob/master/CONTRIBUTING_GUIDELINES.md
- [x] I have signed all commits
- [x] I have added unit tests for the new functionality
- [x] I have run lint and test steps successfully
  - for `jaeger`: `make lint test`
  - for `jaeger-ui`: `yarn lint` and `yarn test`

Signed-off-by: tgolang <seekseat@aliyun.com>
Co-authored-by: Yuri Shkuro <yurishkuro@users.noreply.github.com>
Signed-off-by: Vamshi Maskuri <gwcchintu@gmail.com>

plugin/sampling/strategystore/adaptive/options.go

@@ -116,7 +116,7 @@ type Options struct {
 // AddFlags adds flags for Options
 func AddFlags(flagSet *flag.FlagSet) {
 	flagSet.Float64(targetSamplesPerSecond, defaultTargetSamplesPerSecond,
-		"The the global target rate of samples per operation.",
+		"The global target rate of samples per operation.",
 	)
 	flagSet.Float64(deltaTolerance, defaultDeltaTolerance,
 		"The acceptable amount of deviation between the observed samples-per-second and the desired (target) samples-per-second, expressed as a ratio.",

plugin/storage/cassandra/schema/create.sh

@@ -12,7 +12,7 @@ function usage {
     >&2 echo "  DEPENDENCIES_TTL   - time to live for dependencies data, in seconds (default: 0, no TTL)"
     >&2 echo "  KEYSPACE           - keyspace (default: jaeger_v1_{datacenter})"
     >&2 echo "  REPLICATION_FACTOR - replication factor for prod (default: 2 for prod, 1 for test)"
-    >&2 echo "  VERSION            - Cassandra backend version, 3 or 4 (default: 4). Ignored if template is is provided."
+    >&2 echo "  VERSION            - Cassandra backend version, 3 or 4 (default: 4). Ignored if template is provided."
     >&2 echo ""
     >&2 echo "The template-file argument must be fully qualified path to a v00#.cql.tmpl template file."
     >&2 echo "If omitted, the template file with the highest available version will be used."