chore(build): drop system OpenSSL build option

* Removes the toggle for using a system-provided OpenSSL to
  simplify build configuration and reduce maintenance paths
* Updates the project description string to match new branding

Author: saturneric

CMakeLists.txt

@@ -35,7 +35,7 @@ endif()
 # define project
 project(GpgFrontend
   VERSION 2.2.0
-  DESCRIPTION "GpgFrontend is a modern, cross-platform, open-source GUI for OpenPGP encryption."
+  DESCRIPTION "A modern \"Enigma\" for OpenPGP. "
   HOMEPAGE_URL "https://gpgfrontend.bktus.com"
   LANGUAGES CXX)
 
@@ -69,7 +69,6 @@ option(GPGFRONTEND_XCODE_ENABLE_SANDBOX "Enable SandBox For Xcode Build" OFF)
 
 # check options
 option(GPGFRONTEND_LINK_GPGME_INTO_CORE "Statically link GpgME into the core library" OFF)
-option(GPGFRONTEND_USE_SYSTEM_OPENSSL "Use system OpenSSL instead of building it" OFF)
 
 if(GPGFRONTEND_BUILD_APP_IMAGE)
   set(BUILD_APP_IMAGE 1)
@@ -106,12 +105,6 @@ else()
   set(BUILD_AND_STATIC_LINK_GPGME 0)
 endif()
 
-if(GPGFRONTEND_USE_SYSTEM_OPENSSL)
-  set(USE_SYSTEM_OPENSSL 1)
-else()
-  set(USE_SYSTEM_OPENSSL 0)
-endif()
-
 if(GPGFRONTEND_XCODE_ENABLE_SANDBOX)
   set(APPLE_SANDBOX 1)
 endif()