sam panel: drop the in-panel docs hint label

Users know sam or read docs/SAM.md; the hint was clutter. Panel is now just
the program editor, Run button, and output log.

src/plugin/sampanel.cpp

@@ -7,7 +7,6 @@
 
 #include <QFontDatabase>
 #include <QKeyEvent>
-#include <QLabel>
 #include <QPlainTextEdit>
 #include <QPushButton>
 #include <QSizePolicy>
@@ -54,17 +53,6 @@ SamPanel::SamPanel(QWidget *parent)
     layout->setContentsMargins(4, 4, 4, 4);
     layout->setSpacing(4);
 
-    auto *hint = new QLabel(
-        i18n("sam commands — e.g. <tt>,s/foo/bar/g</tt> or "
-             "<tt>X/\\.cpp$/ ,s/old/new/g</tt> (project-wide). Ctrl+Return runs.<br/>"
-             "Regex is sam's own (leftmost-longest, linear-time): classes like "
-             "<tt>[0-9]</tt>, not <tt>\\d</tt>; <tt>^</tt>/<tt>$</tt> are per-line. "
-             "See docs/SAM.md."),
-        this);
-    hint->setWordWrap(true);
-    hint->setTextFormat(Qt::RichText);
-    layout->addWidget(hint);
-
     m_editor = new SamProgramEdit(this, [this]() {
         Q_EMIT runRequested(program());
     });