Remove spurious parentheses due to \thanks code

The LyX foonote inset was exported as a broken \thanks command
         Replaced by a LyX note

lib/examples/fr/Presentations/Powerdot.lyx

@@ -1,5 +1,5 @@
 #LyX 2.4 created this file. For more info see https://www.lyx.org/
-\lyxformat 600
+\lyxformat 608
 \begin_document
 \begin_header
 \save_transient_properties true
@@ -40,9 +40,9 @@
 \font_default_family default
 \use_non_tex_fonts false
 \font_sc false
+\font_roman_osf false
 \font_sans_osf false
 \font_typewriter_osf false
-\font_roman_osf false
 \font_sf_scale 100 100
 \font_tt_scale 100 100
 \use_microtype false
@@ -93,12 +93,16 @@
 \papercolumns 1
 \papersides 1
 \paperpagestyle default
+\tablestyle default
 \tracking_changes false
-\postpone_fragile_content false
 \output_changes false
+\change_bars false
+\postpone_fragile_content false
 \html_math_output 0
 \html_css_as_file 0
 \html_be_strict false
+\docbook_table_output 0
+\docbook_mathml_prefix 1
 \end_header
 
 \begin_body
@@ -198,7 +202,7 @@ and
 \end_inset
 
  Christopher Ellison
-\begin_inset Foot
+\begin_inset Note Note
 status collapsed
 
 \begin_layout Plain Layout