Baker,
You can use a CSS rule to hide those.
Here is a sample rule for hiding the title, close, minimize, etc on widget _5.
#_5_panel.jimu-panel>.jimu-panel-title>.title-label {
display: none
}
#_5_panel.jimu-panel>.jimu-panel-title>.close-btn {
display: none
}
#_5_panel.jimu-panel>.jimu-panel-title>.max-btn {
display: none
}
#_5_panel.jimu-panel>.jimu-panel-title>.foldable-btn {
display: none
}