missing htaccess data

hello and thanks for such a good plugin.
i had wp-rocket plugin (which i know is a paid plugin and i’m neither comparing plugins nor disrespect your efforts).
later i purchased a host with litespeed, and deleted the wp-rocket.
but as i checked today, wp-rocket left its code in .htaccess file.
i compared those codes. and noticed that wp-rocket code has more codes and seemed to be more detailed.

now my question is should i keep the wp-rocket codes in htaccess?
or should i delete them? will it cause any harm to my speed?

please check and see if it’ll cause any confliction with your codes or not.
the code is :

# BEGIN WP-Rocket
# Use UTF-8 encoding for anything served text/plain or text/html
AddDefaultCharset UTF-8
# Force UTF-8 for a number of file formats
<IfModule mod_mime.c>
AddCharset UTF-8 .atom .css .js .json .rss .vtt .xml
</IfModule>

# FileETag None is not enough for every server.
<IfModule mod_headers.c>
Header unset ETag
</IfModule>

# Since we’re sending far-future expires, we don’t need ETags for static content.
# developer.yahoo.com/performance/rules.html#etags
FileETag None

<IfModule mod_alias.c>
<FilesMatch "\.(html|htm|rtf|rtx|txt|xsd|xsl|xml)$">
<IfModule mod_headers.c>
Header set X-Powered-By "WP-Rocket"
Header unset Pragma
Header append Cache-Control "public"
Header unset Last-Modified
</IfModule>
</FilesMatch>

<FilesMatch "\.(css|htc|js|asf|asx|wax|wmv|wmx|avi|bmp|class|divx|doc|docx|eot|exe|gif|gz|gzip|ico|jpg|jpeg|jpe|json|mdb|mid|midi|mov|qt|mp3|m4a|mp4|m4v|mpeg|mpg|mpe|mpp|otf|odb|odc|odf|odg|odp|ods|odt|ogg|pdf|png|pot|pps|ppt|pptx|ra|ram|svg|svgz|swf|tar|tif|tiff|ttf|ttc|wav|wma|wri|xla|xls|xlsx|xlt|xlw|zip)$">
<IfModule mod_headers.c>
Header unset Pragma
Header append Cache-Control "public"
</IfModule>
</FilesMatch>
</IfModule>

# Expires headers (for better cache control)
<IfModule mod_expires.c>
	ExpiresActive on
	ExpiresDefault                              "access plus 1 month"
	# cache.appcache needs re-requests in FF 3.6 (thanks Remy ~Introducing HTML5)
	ExpiresByType text/cache-manifest           "access plus 0 seconds"
	# Your document html
	ExpiresByType text/html                     "access plus 0 seconds"
	# Data
	ExpiresByType text/xml                      "access plus 0 seconds"
	ExpiresByType application/xml               "access plus 0 seconds"
	ExpiresByType application/json              "access plus 0 seconds"
	# Feed
	ExpiresByType application/rss+xml           "access plus 1 hour"
	ExpiresByType application/atom+xml          "access plus 1 hour"
	# HTC files  (css3pie)
	ExpiresByType text/x-component              "access plus 1 month"
</IfModule>
# Gzip compression
<IfModule mod_deflate.c>
# Active compression
SetOutputFilter DEFLATE
# Force deflate for mangled headers
<IfModule mod_setenvif.c>
<IfModule mod_headers.c>
SetEnvIfNoCase ^(Accept-EncodXng|X-cept-Encoding|X{15}|~{15}|-{15})$ ^((gzip|deflate)\s*,?\s*)+|[X~-]{4,13}$ HAVE_Accept-Encoding
RequestHeader append Accept-Encoding "gzip,deflate" env=HAVE_Accept-Encoding
# Don’t compress images and other uncompressible content
SetEnvIfNoCase Request_URI \
\.(?:gif|jpe?g|png|rar|zip|exe|flv|mov|wma|mp3|avi|swf|mp?g|mp4|webm|webp|pdf)$ no-gzip dont-vary
</IfModule>
</IfModule>

# Compress all output labeled with one of the following MIME-types
<IfModule mod_filter.c>
AddOutputFilterByType DEFLATE application/atom+xml \
		                          application/javascript \
		                          application/json \
		                          application/rss+xml \
		                          application/vnd.ms-fontobject \
		                          application/x-font-ttf \
		                          application/xhtml+xml \
		                          application/xml \
		                          font/opentype \
		                          image/svg+xml \
		                          image/x-icon \
		                          text/css \
		                          text/html \
		                          text/plain \
		                          text/x-component \
		                          text/xml
</IfModule>
<IfModule mod_headers.c>
Header append Vary: Accept-Encoding
</IfModule>
</IfModule>
# END WP-Rocket

thanks a lot.