caddy2: removed unknown tls directive

examples/caddy2/Caddyfile

@@ -1,7 +1,4 @@
 matrix.DOMAIN.tld {
-
-  tls {$CADDY_TLS}
-
   @identity {
         path /_matrix/identity/*
   }
@@ -97,10 +94,7 @@ matrix.DOMAIN.tld:8448 {
 }
 
 dimension.DOMAIN.tld {
-
-      tls {$CADDY_TLS}
-
-      header {
+header {
          	# Enable HTTP Strict Transport Security (HSTS) to force clients to always connect via HTTPS
         	Strict-Transport-Security "max-age=31536000; includeSubDomains; preload"
         	# Enable cross-site filter (XSS) and tell browser to block detected attacks
@@ -127,9 +121,6 @@ dimension.DOMAIN.tld {
 }
 
 element.DOMAIN.tld {
-
-    tls {$CADDY_TLS}
-
  	header {
          	# Enable HTTP Strict Transport Security (HSTS) to force clients to always connect via HTTPS
         	Strict-Transport-Security "max-age=31536000; includeSubDomains; preload"
@@ -153,4 +144,4 @@ element.DOMAIN.tld {
                      header_up X-Forwarded-TlsCipher {tls_cipher}
                      header_up X-Forwarded-HttpsProto {proto}
         }
-}
+}