chore: remove "Hardware" from issue template

For the grand majority of bug reports, user hardware isn't relevant. Figuring
out what to write isn't always trivial.

.github/ISSUE_TEMPLATE.md

@@ -5,7 +5,6 @@ qTox version: (version numbers in menu `Settings → About`)
 Commit hash:  
 toxcore:  
 Qt:  
-Hardware:  
 …
 
 Reproducible: Always / Almost Always / Sometimes / Rarely / Couldn't Reproduce

src/widget/form/settings/aboutform.cpp

@@ -115,8 +115,7 @@ void AboutForm::replaceVersions()
                                 "qTox version: %2\n"
                                 "Commit hash: %3\n"
                                 "toxcore: %4\n"
-                                "Qt: %5\n"
-                                "Hardware: \n…\n\n"
+                                "Qt: %5\n…\n\n"
                                 "Reproducible: Always / Almost Always / Sometimes"
                                 " / Rarely / Couldn't Reproduce\n\n"
                                 "##### Steps to reproduce\n\n"