Remove no longer needed shellcheck suppressions

test/lint/lint-shell.sh

@@ -24,7 +24,6 @@ fi
 # Disabled warnings:
 disabled=(
     SC1087 # Use braces when expanding arrays, e.g. ${array[idx]} (or ${var}[.. to quiet).
-    SC1117 # Backslash is literal in "\.". Prefer explicit escaping: "\\.".
     SC2001 # See if you can use ${variable//search/replace} instead.
     SC2004 # $/${} is unnecessary on arithmetic variables.
     SC2005 # Useless echo? Instead of 'echo $(cmd)', just use 'cmd'.
@@ -36,7 +35,6 @@ disabled=(
     SC2066 # Since you double quoted this, it will not word split, and the loop will only run once.
     SC2086 # Double quote to prevent globbing and word splitting.
     SC2116 # Useless echo? Instead of 'cmd $(echo foo)', just use 'cmd foo'.
-    SC2148 # Tips depend on target shell and yours is unknown. Add a shebang.
     SC2162 # read without -r will mangle backslashes.
     SC2166 # Prefer [ p ] {&&,||} [ q ] as [ p -{a,o} q ] is not well defined.
     SC2181 # Check exit code directly with e.g. 'if mycmd;', not indirectly with $?.