[DOCS] Remove outdated 5.x community plugins (#40306)

Our docs previously included several community plugins that are only supported for versions 5.x and earlier. This removes those plugins for our 6.6+ docs.

docs/plugins/analysis.asciidoc

@@ -49,14 +49,10 @@ Provides stemming for Ukrainian.
 
 A number of analysis plugins have been contributed by our community:
 
-* https://github.com/synhershko/elasticsearch-analysis-hebrew[Hebrew Analysis Plugin] (by Itamar Syn-Hershko)
 * https://github.com/medcl/elasticsearch-analysis-ik[IK Analysis Plugin] (by Medcl)
-* https://github.com/medcl/elasticsearch-analysis-mmseg[Mmseg Analysis Plugin] (by Medcl)
-* https://github.com/imotov/elasticsearch-analysis-morphology[Russian and English Morphological Analysis Plugin] (by Igor Motov)
 * https://github.com/medcl/elasticsearch-analysis-pinyin[Pinyin Analysis Plugin] (by Medcl)
 * https://github.com/duydo/elasticsearch-analysis-vietnamese[Vietnamese Analysis Plugin] (by Duy Do)
 * https://github.com/ofir123/elasticsearch-network-analysis[Network Addresses Analysis Plugin] (by Ofir123)
-* https://github.com/medcl/elasticsearch-analysis-string2int[String2Integer Analysis Plugin] (by Medcl)
 * https://github.com/ZarHenry96/elasticsearch-dandelion-plugin[Dandelion Analysis Plugin] (by ZarHenry96)
 * https://github.com/medcl/elasticsearch-analysis-stconvert[STConvert Analysis Plugin] (by Medcl)