WordPress at a glance
filter is not described

theme_install_actions filter-hook . WP 3.4.0

Filters the install action links for a theme in the Install Themes list table.

Usage

add_filter( 'theme_install_actions', 'filter_function_name_6919', 10, 2 );
function filter_function_name_6919( $actions, $theme ){
	// filter...

	return $actions;
}
$actions(array)
An array of theme action hyperlinks.
Default: are links to Install Now, Preview, and Details
$theme(WP_Theme)
Theme object.

Where the hook is called

WP_Theme_Install_List_Table::single_row()
theme_install_actions
wp-admin/includes/class-wp-theme-install-list-table.php 300
$actions = apply_filters( 'theme_install_actions', $actions, $theme );

Where the hook is used (in WP core)

Does not used.